nav {
    width: 100%;
    border-top: solid 1px #ccc;
    position: fixed;
    bottom: 0;
    height: 1.42rem;
    line-height: 1.42rem;
}

nav ul {
    display: flex;
    justify-content: space-around;
    height: 100%;
    background: #fff;
}

nav ul li {
    height: 100%;
}

.nav-item {
    padding: .2rem 0;
}

.nav-icon {
    position: relative;
    width: 100%;
}

.nav-text {
    margin-top: .1rem;
    text-align: center;
}

.nav-item.active {
    color: #005aaa;
}

.nav-icon::after {
    content: '';
    height: .52rem;
    width: .58rem;
    position: absolute;
}

.nav-home::after {
    background: url(../images/Home_51.png) no-repeat;
    background-size: 100% 100%;
}

.nav-manage::after {
    background: url(../images/Home_48.png) no-repeat;
    background-size: 100% 100%;
}

.nav-mine::after {
    background: url(../images/Home_45.png) no-repeat;
    background-size: 100% 100%;
}